Spring spel method invocation example

Spring SpEL method invocation:

Spring spel provides the facility of method invocation i.e. execute method and inject the method returned value into property.

Syntax:

#{beanName.methodName}

Example:

Address.java

import org.springframework.stereotype.Component;
 
@Component("studentClassBean")
public class StudentClass {
	public String getClassName(){
		return "MCA Final";
	}
}

Student.java

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
 
@Component("studentBean")
public class Student {
	@Value("Jai")
	private String name;	
 
	@Value("#{studentClassBean.className}")
	private String className;
 
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
 
	public String getClassName() {
		return className;
	}
	public void setClassName(String className) {
		this.className = className;
	}	
}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 
 <context:component-scan base-package="com.w3spoint.business" />
 
</beans>

Test.java

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
/**
 * Spring SPEL method invocation example.
 * @author w3spoint
 */
public class Test {
 public static void main(String args[]){	
   //Get application context object.
   ApplicationContext context = 
     new ClassPathXmlApplicationContext("applicationContext.xml");
 
   //Get studentBean.
   Student student = (Student) context.getBean("studentBean");
 
   //Print student properties.
   System.out.println("Name: "+student.getName()); 
   System.out.println("Street: "+student.getClassName()); 
 }
}

Output:

Name: Jai
Street: MCA Final

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